/*
 * Copyright (c) 2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.libermundi.tapestry.elfinder.commands;

import java.io.File;
import java.util.List;

import org.apache.tapestry5.json.JSONArray;
import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.upload.services.UploadedFile;
import org.libermundi.tapestry.elfinder.exception.ElFinderException;
import org.libermundi.tapestry.elfinder.exception.VolumeIOException;

/**
 * 
 * @author Martin Papy
 *
 */
public class UploadCommand extends AbstractCommand {
	
	public UploadCommand(Request request){
		super(request);
	}

	@Override
	public Object execute() throws ElFinderException {
		JSONArray added = new JSONArray();
		List<UploadedFile> uploadedFiles = getElFinderService().getUploadedFiles("upload[]");

		for (UploadedFile uplFileEntry : uploadedFiles) {

			checkUploadSizes(uplFileEntry.getSize());
			
			File newFile;
			try {
				newFile = getVolume().save(uplFileEntry, getWorkingFile());
				added.put(_infos(newFile));
			} catch (VolumeIOException e) {
				throw new ElFinderException(e.getMessage(),e);
			}

		}

		putResponse("added", added);
		return getJSON();
	}
	
	protected void checkUploadSizes(long uploadSizeOctets) throws ElFinderException {
		// check total size
		long totalSizeOctets = getVolume().getTotalSize();
		if ((totalSizeOctets + uploadSizeOctets) > (getVolume().getMaxUploadSize())) {
			throw new ElFinderException("File exceeds the maximum allowed filesize (" + getVolume().getMaxUploadSize()/1024 + " KB)");
		}
	}
	
}
